I scraped Reddit, HN, and Product Hunt daily for months to find startup ideas

Six months ago I kept running into the same problem. I'd want to build something but had no idea what people actually needed. I'd skim Reddit, check HN, glance at Product Hunt — and get overwhelmed. Signal in there, buried in noise.

So I automated the boring part.

Signal Scanner scrapes Reddit, Hacker News, X, and Product Hunt daily, then scores every problem it finds across three dimensions:

Demand (1–5): Are people actively complaining about this? Paying for workarounds?
Market gap (1–5): Does a clean solution already exist, or is the space wide open?
Build effort (1–5): Could a solo builder ship an MVP in a weekend? Or is this a team-year project?

The goal was simple: give myself a ranked list of things worth building, backed by real signal rather than vibes.

It now has 558 problems scored, updated daily. No signup required to browse.

A couple from this week that caught my eye:

"Serverless Usage Circuit Breaker" (Demand: 5/5, Gap: 5/5, Effort: 1/5) — Runaway Cloudflare Workers from AI agents are causing surprise $1K+ bills. No native circuit breaker exists. Source: HN thread with 200+ upvotes.

"Security Auditor for AI-Generated Codebases" (Demand: 5/5, Gap: 5/5, Effort: 1/5) — Vibe coders are shipping apps with no RLS, exposed DBs, hardcoded secrets. Zero visibility into what Claude actually built.

Both weekend-project-sized gaps with real demand.

signals.microbuilder.co — free, no account needed.

Curious: do you use tools like this for ideation, or do you trust your own problem sense more? I've found it more useful for gut-checking ideas I already have than for pure inspiration — but wondering if others use it differently.